.bottom {
  width: 100%;
  height: 1.2rem;
  background: rgba(255,255,255,0.8);
  position: fixed;
  left: 0;
  bottom: 0;
  z-index: 100;
  text-align: center;
}
.bottom a {
  display: inline-block;
  height: 0.6rem;
  padding: 0 0.2rem;
  border-radius: 0.6rem;
  line-height: 0.6rem;
  margin-top: 0.3rem;
  background: #30c27c;
  color: white;
}